As the title says, Why would I buy an M90? Obviously an M109 is bigger and more powerful and more bling. I have riden one and enough grunt to tow a truck. I haven't been able to get a test ride on an M90 yet but I thought I would get some opinions. From a little research the only benefit of an M90 over an M109 is handling. That 240 tyre just doesn't like corners so they say. When I rode one I would have to agree, it was a handful going around roundabouts. So lets hear all the pros and cons.